How to create large PDF files 10MB 50MB 100MB 200MB 500MB 1GB etc for testing purposes

Question

I tried this for   i 1  i lt  10  i      do convert 100MB pdf 10MB pdf 100MB pdf  done to create 100MB file but very quickly run out of RAM   Any ideas

User · Answer

Windows  fsutil  Usage   fsutil file createnew  filename   extension     of bytes    Source  https   www windows-commandline com how-to-create-large-dummy-file    Linux  fallocate  Usage   fallocate -l 10G  filename   extension    Source  Quickly create a large file on a Linux system

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I had problems using pdftk with the cat parameter had a better success with output   The following command worked for me   pdftk file 1 pdf file 1 pdf file 1 pdf file 1 pdf cat output pdf   Using cat produced the following error   Error  Unexpected text in page range end  here       output pdf     Exiting      Acceptable keywords  for example   even  or  odd       To rotate pages  use   north   south   east           west   left   right  or  down  Errors encountered   No output created  Done   Input errors  so no output created    http   www pdflabs com docs pdftk-cli-examples    I created a 172mb PDF is no time at all

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For those using macOS mkfile might be a good alternative to fallocate or dd   mkfile 100m some100mfile pdf  reference -  https   stackoverflow com a 33478049 711401

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Have you tried using cat to combine the files   cat 10MB pdf 10MB pdf  gt  20MB pdf   That should result in a 20MB file

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One possibility is  if you are familiar with PDF format    Create some simply PDF with one page  Page should be contained within one object  Copy object multiply times Add references to the copied objects to the page catalog Fix xref table   You get an valid document of any size  entire file will be processed by a reader

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If you want to generate a file in the Windows  then  please follow the below steps   Go to a directory where you want to save the generated file Open the command prompt on that directory Run this fsutil file createnew  filename   extension     of bytes  command  For example fsutil file createnew test pdf 999999999 95 3 MB File will be generated  Update  The generated file will not be a valid pdf file  It just holds the given size

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Under Linux there is pdfunite  part of poppler  that can concatenate the same pdf files to get one large pdf file   pdfunite in pdf in pdf in pdf out pdf   see manpage

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Partly it depends on what you are trying to increase the size of    number of pages  number of images  size of a single image  In my experience  the vast bulk  90    of any given  large  PDF file will be the images   You could try using a pro product like Adobe InDesign to quickly build a large project and export it as a PDF   Adobe Acrobat Pro has built-in tools to optimize PDF files -- you try using the tools to  un-optimize  your file

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If you want a really big valid PDF file  then    take all the biggest valid pdf you can  With a tool like PDF24Creator make a fusion of pdfs   It works for me to create a big file  140MB  after some minutes

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The most simple tool  use pdftk  or pdftk exe  if you are on Windows    pdftk 10 MB pdf 100 MB pdf cat output 110 MB pdf   This will be a valid PDF   Download pdftk here   Update  if you want really large  and valid    non-optimized PDFs  use this command   pdftk 100MB pdf 100MB pdf 100MB pdf 100MB pdf 100MB pdf cat output 500 MB pdf   or even  if you are on Linux  Unix or Mac OS X    pdftk   for i in   seq 1 100   do echo -n  100MB pdf    done  cat output 10 GB pdf

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according to http   www maketecheasier com combine-multiple-pdf-files-with-pdftk  the command should be   pdftk file1 pdf file2 pdf file3 pdf cat output newfile pdf   note that you should download windows version of pdftk

[testing] How to create large PDF files (10MB, 50MB, 100MB, 200MB, 500MB, 1GB, etc.) for testing purposes?

Windows: `fsutil`

Linux: `fallocate`

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